Hi All,
ACI 376-11 in Clause 11.4.4.2 calls for a full-scale grouting test for PT Tendons. We have a LNG tank 46m high and would need to do a full-scale test (46m high) by building a mock-up sample and grouting it to satisfy code and spec. (140mm duct with 27 strand tendon).
It seems a...
Hi
Has anyone had any success and know how in casting a concrete slab in a multistory garage with a slope for drainage (1:60)?
We have large areas and want to avoid screeds (and a disaster).
Regards
Newbie
Gents,
When does IBC 2012 come into effect? Is IBC 2009 immwediately withdrawn.
The reason I am asking is that I'm working overseas on a contract that mentions ibc 2009, but in the same breadth mentions the latest versions of codes are to be used at the time the contract is signed.
Regards...
Dear All,
In BS 8110 pt 1 clause 3.8.12.6a the code describes anchorage of shear links having a 90 degree bend of certain dimension.
Is it permissible to use such a 90 degree anchor (i.e. a U shaped link) at each end of the link.
Or, as the standard methods of detailing decribe must we use a...
Where I live all the fire escape stairs are concrete. I have noticed that in the US most escape stairs are made from steel.
How do you justify the cost of steel stair and applied fire protection? Or do you have another technique to avoid fire protecting the metal?
Newbuilder
Hello,
I have a very complex suretrak network for a building. I periodically enter the progress as a percentage of each activity.
Is there any way the program will calucate the number of days or behind schedule a particular activity is?
Regards,
Newbuilder
If I design a portal frame with a footing under each column, then I can check the global stability against overturning by providing a suitable footing mass under each column.
The same frame is designed as being fixed at the base, i.e. a moment is transferred to each footing. Does this footing...
Nearly every beam detail I've seen anchors the top reinforcement at the support "downwards" into a column or wall. This often occurs with the bottom bars too.
However, the contractors will cast the walls and columns to the soffit of the beam (and slabs). To avoid uneven construction...
We have large stainless steel door subframe to be fixed to a rc frame. The detail calls for some kind of cast in fixing (which was not cast-in).
The fabricator says that it is common to drill and grout some steel rebar dowels then weld them to the ss frame.
Is this normal? Can ms and ss be...
With reference to BS 8110 cl 3.12.8.13
Should the factors of 1.4 or 2 be applied to wall and column reinforcement?
Is the wall or column surface "the top of section as cast"?
NB
The Engineer has requested that we perform a safety test on our window design of 25% over the design load. There are several issues of concern:
the test is uncommon locally, though testing to the design load is common.
the supplier is quite uncertain about success
our design load is 6.9kPa so...
I came across a situation a while ago where I was required to support a temporary structure on through bolts. These bolts actually passed through holes that were bigger than the bolts.
I was concerned whether to design the bolts for shear, bending and bearing. The bending requirement increased...
What exactly is Leda Clay and how does one deal with it? Someone asked me recently and after searching the web I discovered that it appears to have a low remoulded strength and will liquify if touched.
It it normally removed, avoided or strengthened. This is a general interest question.
Thnaks...
Hello,
I have heard that a popular method of relieving negative skin friction on driven steel H piles is to coat them with bitumen. Does anyone have experience of this? Is it a reliable technique or does it boil down to the results from particular test piles on a site proving the theory?
NB
Does anybody have experience using grout curtains to stop the flow of water through a temporary sheet pile wall?
I have to design the sheet pile wall to support submerged FILL. Since there are many buildings around the excavation I am concerned that settlement will occur. I can adjust the...
What are the common techniques used to deal with new tunnels next to pile foundations.
I am thinking of designing the tunnel to transfer the pile lateral loads through the lining structure. Is this the best way?
Another option is to investigate by calculation, the redundancy of part of the...
Hello,
I am researching quiet construction techniques for an city development.
The noise limitation in our city are very strict.
I have proposals for noise barriers but they are very cumbersome. I have also scheduled the work so that noisy activities are intermittant. My building would be...
